commit 00459e4a0618b1832626d0eb320c66bde94ea701
author Matt Arsenault <Matthew.Arsenault@amd.com> Thu Aug 24 07:55:13 2017 +0000
committer Matt Arsenault <Matthew.Arsenault@amd.com> Thu Aug 24 07:55:13 2017 +0000
tree e27f24b5ee44f03a024b9cc97a257af99d3e479e
parent 046a969360a08de4c3056937ccead111f6c5be9d

IPRA: Exit early on functions without calls

llvm-svn: 311636

llvm/lib/CodeGen/RegUsageInfoPropagate.cpp

diff --git a/llvm/lib/CodeGen/RegUsageInfoPropagate.cpp b/llvm/lib/CodeGen/RegUsageInfoPropagate.cpp
index 5cc35bf..a39c945 100644
--- a/llvm/lib/CodeGen/RegUsageInfoPropagate.cpp
+++ b/llvm/lib/CodeGen/RegUsageInfoPropagate.cpp
@@ -21,6 +21,7 @@
 
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/Passes.h"
@@ -95,6 +96,10 @@
                << " ++++++++++++++++++++  \n");
   DEBUG(dbgs() << "MachineFunction : " << MF.getName() << "\n");
 
+  const MachineFrameInfo &MFI = MF.getFrameInfo();
+  if (!MFI.hasCalls() && !MFI.hasTailCall())
+    return false;
+
   bool Changed = false;
 
   for (MachineBasicBlock &MBB : MF) {